Yes Russel I run trains on the upper track and they include live steam and electric units.
It is designed mostly for smaller Narrow Gauge engines but the following video shows the
running of a live steam Shay on the 2% grades. There is an interchange track to allow trains to
go from the lower track to the upper track and I use that mostly to exchange rolling stock when needed.
Some of you may recognize some of the familiar faces in this older video....